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International Trade

How the Exchange of Goods and Services Shapes the Global Economy. Slides: International Trade · Why Do Countries Trade? · The Theory: From Smith to New Trade Theory · Comparative Advantage: The Core Insight · A Brief History of Trade: Ancient Routes · The Age of Exploration and Mercantilism.

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This Shipslides page presents International Trade as an interactive HTML presentation deck in the Business catalog with 32 slides. The share page keeps the uploaded deck sandboxed while exposing readable context, topics, and a slide outline for viewers and search engines.

How the Exchange of Goods and Services Shapes the Global Economy Key sections include: International Trade; Why Do Countries Trade?; The Theory: From Smith to New Trade Theory; Comparative Advantage: The Core Insight; A Brief History of Trade: Ancient Routes; The Age of Exploration and Mercantilism; Free Trade and the British Era (1800s); Protectionism and Its Tools; The Great Depression and Trade Wars; The Post-War Order: GATT and the WTO.

Key sections

  • 01International Trade
  • 02Why Do Countries Trade?
  • 03The Theory: From Smith to New Trade Theory
  • 04Comparative Advantage: The Core Insight
  • 05A Brief History of Trade: Ancient Routes
  • 06The Age of Exploration and Mercantilism
  • 07Free Trade and the British Era (1800s)
  • 08Protectionism and Its Tools
  • 09The Great Depression and Trade Wars
  • 10The Post-War Order: GATT and the WTO
  • 11Regional Trade Agreements
  • 12The Container Revolution
  • 13Global Supply Chains
  • 14Winners and Losers from Trade
  • 15Trade and Development
  • 16Trade in Services
  • 17Currency and Trade
  • 18Intellectual Property in Trade
  • 19Trade and the Environment
  • 20The US-China Trade War
  • 21Trade and Labor
  • 22Trade and Geopolitics
  • 23Digital Trade and E-Commerce
  • 24Trade Finance: How Trade Gets Paid

Topics covered

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Slide outline
  1. 01International Trade
  2. 02Why Do Countries Trade?
  3. 03The Theory: From Smith to New Trade Theory
  4. 04Comparative Advantage: The Core Insight
  5. 05A Brief History of Trade: Ancient Routes
  6. 06The Age of Exploration and Mercantilism
  7. 07Free Trade and the British Era (1800s)
  8. 08Protectionism and Its Tools
  9. 09The Great Depression and Trade Wars
  10. 10The Post-War Order: GATT and the WTO
  11. 11Regional Trade Agreements
  12. 12The Container Revolution
  13. 13Global Supply Chains
  14. 14Winners and Losers from Trade
  15. 15Trade and Development
  16. 16Trade in Services
  17. 17Currency and Trade
  18. 18Intellectual Property in Trade
  19. 19Trade and the Environment
  20. 20The US-China Trade War
  21. 21Trade and Labor
  22. 22Trade and Geopolitics
  23. 23Digital Trade and E-Commerce
  24. 24Trade Finance: How Trade Gets Paid
  25. 25Trade Disputes and Resolution
  26. 26The New Industrial Policy
  27. 27Trade and Inequality
  28. 28Supply Chain Disruptions
  29. 29The Future of Trade
  30. 30Trade Policy Debates: Where Do You Stand?
  31. 31Trade by the Numbers
  32. 32Key Takeaways
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Slide 01

International Trade

  • How the Exchange of Goods and Services Shapes the Global Economy
  • International trade is the engine of global prosperity -- and a source of its deepest inequalities. From the Silk Road to container ships, from mercantilism to the WTO, the movement of goods across borders has shaped civilizations, sparked wars, created wealth, and destroyed industries. This presentation explores the theory, history, institutions, and contemporary challenges of global trade.
  • $25 Trillion in Global Trade (2023)
  • 164 WTO Member Nations
  • 5,500+ Container Ships at Sea
Slide 02

Why Do Countries Trade?

  • The fundamental question: why don't countries produce everything they need domestically?
  • Resource Differences
  • Saudi Arabia has oil; Japan doesn't. Brazil has farmland; Singapore doesn't. Geography creates natural specialization that trade exploits.
  • Comparative Advantage
  • Even if one country can produce everything cheaper, both benefit from specializing where their relative advantage is greatest. David Ricardo's key insight (1817).
  • Economies of Scale
  • Larger production runs mean lower unit costs. Countries specialize to achieve scale impossible in small domestic markets. South Korea makes 70% of the world's memory chips.
  • Consumer Choice
  • Trade gives consumers access to variety impossible from domestic production alone. No single country can produce all the world's goods at competitive quality.
Slide 03

The Theory: From Smith to New Trade Theory

  • 1776 - Adam Smith
  • Absolute Advantage: Countries should export goods they produce most efficiently and import others. Specialization increases total output. Simple but incomplete.
  • 1817 - David Ricardo
  • Comparative Advantage: Even if one country is better at everything, trade still benefits both if each specializes in their *relatively* cheapest product. The most important insight in economics.
  • 1933 - Heckscher-Ohlin
  • Factor Endowments: Countries export goods that use their abundant factors intensively. Capital-rich countries export capital-intensive goods; labor-rich countries export labor-intensive goods.
  • 1979 - Paul Krugman
  • New Trade Theory: Economies of scale and network effects explain why similar countries trade similar goods. First-mover advantages create path-dependent specialization.
  • 2003 - Marc Melitz
  • Firm Heterogeneity: Only the most productive firms export. Trade liberalization causes reallocation from less to more productive firms, boosting aggregate productivity.
Slide 04

Comparative Advantage: The Core Insight

  • "Under a system of perfectly free commerce, each country naturally devotes its capital and labour to such employments as are most beneficial to each."
  • -- David Ricardo, On the Principles of Political Economy and Taxation (1817)
  • Ricardo's example: Portugal is better at producing both wine AND cloth than England. Yet both countries benefit if Portugal specializes in wine (where its advantage is greatest) and England in cloth (where its disadvantage is least).
  • Without Trade
  • Each country produces both goods
  • Resources split between products
  • Total output is lower
  • No specialization benefits
  • With Trade
  • Each country specializes
  • Total world output increases
  • Both countries can consume more
  • Gains from trade are mutual
  • Comparative advantage is the theoretical foundation for free trade -- but it assumes factors of production can move between industries (workers displaced from cloth can make wine). In practice, this adjustment is slow and painful.
Slide 05

A Brief History of Trade: Ancient Routes

  • The Silk Road (~130 BCE - 1450s)
  • A 4,000-mile network connecting China to Rome. Carried silk, spices, paper, gunpowder, and religions (Buddhism, Islam) across Central Asia. Created the first integrated Eurasian economy.
  • Indian Ocean Trade (3000 BCE+)
  • Monsoon winds enabled reliable sailing between East Africa, Arabia, India, and Southeast Asia. Spices, textiles, gold, and enslaved people moved along routes predating written history.
  • Mediterranean Networks
  • Phoenician, Greek, and Roman commerce created a unified economic zone. Grain from Egypt, olive oil from Greece, tin from Britain. Rome's trade volume wouldn't be matched until the 19th century.
  • Trans-Saharan Routes
  • Gold from West Africa traded for salt from the Sahara, with other goods flowing in both directions. Created wealthy empires (Ghana, Mali, Songhai) that rivaled contemporary European states.
Slide 06

The Age of Exploration and Mercantilism

  • European maritime expansion (1400s-1700s) created the first truly global trade system -- built on violence:
  • Key Developments
  • 1498: Vasco da Gama reaches India by sea, bypassing Muslim middlemen
  • 1500s: Spanish silver from Americas floods global economy
  • 1602: Dutch East India Company -- first multinational corporation
  • 1600s-1700s: Atlantic triangle trade (goods, slaves, commodities)
  • Mercantilist Philosophy
  • Wealth = gold/silver accumulation
  • Exports good, imports bad (trade surplus is goal)
  • Colonies exist to supply raw materials and buy finished goods
  • State should actively promote exports and restrict imports
  • Zero-sum thinking: one nation's gain is another's loss
  • Mercantilism justified colonial extraction. India was forced to export raw cotton to Britain and buy back finished textiles -- destroying India's own textile industry. Trade was a tool of imperial domination.
Slide 07

Free Trade and the British Era (1800s)

  • Britain, having industrialized first, became the champion of free trade -- because free trade served its interests:
  • 1776
  • Adam Smith publishes "The Wealth of Nations," attacking mercantilism. Free trade increases total wealth for all nations, not just the exporter.
  • 1846
  • Britain repeals the Corn Laws (grain tariffs). A landmark victory for free trade ideology. Cheap food imports benefit industrial workers; British agriculture suffers.
  • 1860
  • Cobden-Chevalier Treaty between Britain and France inaugurates an era of bilateral trade liberalization across Europe.
  • 1870-1914
  • First era of globalization. Trade/GDP ratios reach levels not matched again until the 1990s. Steamships, telegraphs, and the gold standard integrate world markets.
  • Friedrich List (1841) argued that free trade benefits the already-industrialized. Developing nations need temporary protection ("infant industry" argument) to build competitive industries. This debate continues today.
Slide 08

Protectionism and Its Tools

  • Countries protect domestic industries using a variety of mechanisms:
  • ToolMechanismExample
  • TariffTax on imports, raising their priceUS 25% tariff on imported steel (2018)
  • QuotaLimit on quantity of imports allowedJapan's rice import quotas
  • SubsidyGovernment payment to domestic producersEU Common Agricultural Policy (~$65B/year)
  • Non-tariff barrierRegulations, standards, licensing requirementsEU food safety rules blocking US chicken
  • Currency manipulationKeeping currency artificially weak to boost exportsChina's yuan management (pre-2015)
  • State procurementRequiring government to buy domesticUS Buy American Act
  • Embargo/SanctionsComplete ban on trade with specific countriesUS embargo on Cuba (1960-present)
Slide 09

The Great Depression and Trade Wars

  • The 1930s demonstrated how protectionism can spiral into catastrophe:
  • The Smoot-Hawley Disaster
  • 1930: US passes Smoot-Hawley Tariff Act, raising tariffs on 20,000+ imported goods to record levels
  • Intended to protect American farmers and manufacturers
  • Trading partners retaliated immediately with their own tariffs
  • World trade fell 65% between 1929-1934
  • Worsened the Great Depression significantly
  • Lessons Learned
  • Protectionism invites retaliation (tit-for-tat escalation)
  • "Beggar thy neighbor" policies impoverish everyone
  • Trade contraction deepens recessions
  • International cooperation needed to prevent spirals
  • This experience directly motivated post-WWII trade institutions
  • The lesson of Smoot-Hawley shaped 80 years of trade policy. When politicians propose tariffs today, economists almost universally point to the 1930s as warning. (Whether this lesson still holds in the 2020s is increasingly debated.)
Slide 10

The Post-War Order: GATT and the WTO

  • After WWII, the victorious Allies created institutions to prevent another trade war:
  • 1947
  • GATT (General Agreement on Tariffs and Trade) signed by 23 nations. Establishes principles: most-favored-nation treatment, tariff reduction through negotiation rounds, dispute settlement.
  • 1947-1994
  • Eight negotiating rounds progressively reduce tariffs. Average tariffs fall from ~40% to ~4% on manufactured goods among developed nations.
  • 1995
  • WTO replaces GATT. Stronger enforcement, covers services and intellectual property (not just goods), binding dispute settlement. 164 member nations.
  • 2001
  • China joins WTO. The most consequential accession in history. Within 20 years, China becomes the world's largest goods exporter, reshaping global trade patterns.
  • GATT/WTO principles: non-discrimination, reciprocity, transparency, and progressive liberalization. Together with the IMF and World Bank, they form the "Bretton Woods" trade architecture.
Slide 11

Regional Trade Agreements

  • Alongside the global WTO system, regional trade blocs create deeper integration among neighbors:
  • European Union
  • The deepest trade integration ever achieved. Single market with free movement of goods, services, capital, and labor. Common external tariff. 27 nations, 450 million people, $16 trillion GDP.
  • USMCA (formerly NAFTA)
  • North American free trade zone: US, Canada, Mexico. Created in 1994, renegotiated 2020. Eliminated most tariffs; created integrated supply chains (a car may cross the border 8 times during production).
  • RCEP
  • Regional Comprehensive Economic Partnership (2022). 15 Asia-Pacific nations including China, Japan, South Korea, ASEAN. Covers 30% of world GDP and population. The largest trade bloc by coverage.
  • African Continental FTA
  • Signed 2018, covering 54 African nations. Aims to create a single market of 1.3 billion people. If fully implemented, would be the largest free trade area by number of countries.
Slide 12

The Container Revolution

  • "The container made shipping so cheap that it pays for British fish to be shipped to China for filleting and then shipped back to British stores. That's how transformative it was."
  • -- Marc Levinson, The Box (2006)
  • Before Malcolm McLean's standardized shipping container (1956), loading a ship took weeks and cost dollars per pound. After:
  • 90%
  • of world trade (by volume) now moves in containers. A single ship carries 24,000 TEUs (20-foot equivalent units)
  • $0.01
  • Cost to ship a can of beer from Europe to US. Transportation costs became negligible compared to production costs
  • 80%
  • Reduction in cargo handling costs since containerization. Loading time dropped from days to hours
  • The container enabled global supply chains by making distance nearly free. It's why iPhones can be designed in California, manufactured in China from Japanese chips and Korean screens, and still be profitable.
Slide 13

Global Supply Chains

  • Modern trade is less about finished products crossing borders and more about components moving through multi-country production networks:
  • The iPhone Example
  • Design: USA (Apple, Cupertino)
  • Processors: Taiwan (TSMC fabrication)
  • Memory: South Korea (Samsung/SK Hynix)
  • Display: South Korea/Japan (Samsung, LG)
  • Assembly: China (Foxconn, Pegatron)
  • Rare earths: China/DRC (lithium, cobalt)
  • Glass: USA (Corning Gorilla Glass)
  • Key Features
  • Products cross borders multiple times during production
  • Gross trade figures overstate "real" trade (double-counting components)
  • Countries specialize in tasks, not whole products
  • Lead firms capture most value; assembly captures least
  • Fragility: disruption anywhere halts production everywhere
  • The "smile curve": in a global value chain, highest value-added is at the beginning (R&D, design) and end (marketing, retail). Manufacturing/assembly in the middle captures the least value. This explains why Apple captures ~30% of iPhone revenue despite doing no manufacturing.
Slide 14

Winners and Losers from Trade

  • Trade increases total wealth but distributes gains and losses unequally:
  • Winners
  • Consumers (cheaper, more varied goods)
  • Export industries and their workers
  • Multinational corporations
  • Countries with newly competitive industries
  • The global economy as a whole
  • Losers
  • Workers in import-competing industries
  • Communities dependent on single industries
  • Less-productive domestic firms
  • Countries locked into low-value commodity exports
  • The environment (transport emissions, race to bottom)
  • The "China Shock" (Autor et al., 2013) showed US manufacturing communities devastated by Chinese imports experienced sustained unemployment, falling wages, and social dysfunction -- the gains from cheaper goods didn't compensate the concentrated losses.
Slide 15

Trade and Development

  • Can trade lift poor countries out of poverty? The evidence is mixed:
  • Success Stories
  • East Asian Tigers (1960s-90s): South Korea, Taiwan, Singapore, Hong Kong used export-led growth to transform from poor to rich in one generation
  • China (1980s-2020s): Lifted 800 million from extreme poverty largely through integration into global trade
  • Vietnam (1990s-present): From subsistence economy to manufacturing powerhouse through trade liberalization
  • Challenges
  • Commodity trap: Countries exporting only raw materials face volatile prices and declining terms of trade
  • Dutch disease: Resource exports strengthen currency, making other exports uncompetitive
  • Infant industry failure: Premature liberalization kills nascent domestic industries
  • Race to bottom: Competition for investment lowers labor/environmental standards
Slide 16

Trade in Services

  • The fastest-growing segment of international trade is not goods but services:
  • $7.1T
  • Global services trade (2023). Growing faster than goods trade. Now ~25% of total trade, and over 50% when measured by value-added.
  • Types of Services Trade
  • Mode 1: Cross-border (Indian call center serving US customers)
  • Mode 2: Consumption abroad (medical tourism in Thailand)
  • Mode 3: Commercial presence (US bank branch in London)
  • Mode 4: Movement of people (consultant working abroad)
  • Key Sectors
  • Financial services (banking, insurance)
  • IT and business services (outsourcing, consulting)
  • Transportation and logistics
  • Tourism and travel
  • Telecommunications
  • Intellectual property and licensing
Slide 17

Currency and Trade

  • Exchange rates profoundly affect trade competitiveness:
  • How Currencies Affect Trade
  • Weak currency = cheaper exports, expensive imports
  • Strong currency = expensive exports, cheap imports
  • Currency volatility creates uncertainty for traders
  • Countries sometimes deliberately weaken currency to boost exports ("currency manipulation")
  • Key Concepts
  • Balance of payments: Record of all economic transactions between a country and the world
  • Trade deficit: Imports exceed exports (US: ~$800B/year)
  • Reserve currency: USD used for 60% of global trade invoicing
  • Purchasing Power Parity: Exchange rates should equalize prices across countries (in theory)
  • The US can run persistent trade deficits because the dollar is the world's reserve currency. Other countries want to hold dollars, so they're willing to sell goods to Americans on credit -- financing US consumption. This "exorbitant privilege" may not last forever.
Slide 18

Intellectual Property in Trade

  • Ideas have become one of the most valuable traded commodities:
  • TRIPS Agreement (1995)
  • The WTO's Agreement on Trade-Related Aspects of Intellectual Property Rights requires all members to enforce patents, copyrights, and trademarks to minimum standards. Controversial: benefits IP-rich developed nations.
  • Pharmaceutical Patents
  • Drug patents grant 20 years of monopoly pricing. Developing nations argue this makes life-saving medicines unaffordable. The TRIPS waiver for COVID vaccines (2022) showed the tension.
  • Technology Transfer
  • China's requirement that foreign firms share technology as a condition of market access has been a major trade dispute. The US argues it's forced IP theft; China calls it standard industrial policy.
  • Digital Trade
  • Software, data, digital services -- an increasing share of trade is intangible. Traditional trade rules were designed for physical goods and struggle with bits crossing borders.
Slide 19

Trade and the Environment

  • Global trade creates enormous environmental pressures:
  • Transport Emissions
  • International shipping alone accounts for 2.5% of global greenhouse gas emissions (more than most countries). Aviation freight adds more. The carbon cost of distance.
  • Pollution Havens
  • Firms relocate dirty production to countries with lax environmental regulation. The "pollution haven hypothesis" suggests trade liberalization exports environmental damage to developing nations.
  • Resource Extraction
  • Trade demand drives deforestation (palm oil, soybeans), overfishing, and mining. Consumer countries externalize environmental costs onto producer nations.
  • Carbon Border Adjustments
  • The EU's CBAM (2023) taxes imports based on their carbon content -- preventing "carbon leakage" where production moves to avoid climate regulation. Other nations may follow.
  • Paradox: trade reduces poverty (which reduces fertility and deforestation), but also increases consumption and transport. Whether globalization is net-positive or negative for the environment depends on policy choices.
Slide 20

The US-China Trade War

  • The most significant trade conflict of the 21st century began in 2018 and continues to reshape global commerce:
  • 2018
  • Trump administration imposes tariffs on $360B of Chinese imports (25% on most goods). China retaliates on $110B of US exports. The rules-based trading system shakes.
  • 2020
  • "Phase One" deal: China promises to buy $200B more US goods (largely unfulfilled). Tariffs remain. COVID-19 disrupts supply chains, revealing dependence on Chinese manufacturing.
  • 2022-2024
  • Biden administration maintains most Trump tariffs and adds semiconductor export controls. "De-risking" replaces "decoupling" as policy language. Technology becomes the new trade battleground.
  • 2025+
  • Supply chains restructure: "friend-shoring" (trading with allies) and "near-shoring" (Vietnam, Mexico, India as alternatives to China). The post-WWII consensus on free trade fractures.
Slide 21

Trade and Labor

  • The impact of trade on workers is perhaps the most politically contentious dimension:
  • Standard Theory (Stolper-Samuelson)
  • Trade benefits a country's abundant factor of production. In rich countries, trade benefits skilled workers (capital is abundant) and hurts unskilled workers (labor is abundant relative to trading partners).
  • Explains rising inequality in developed nations
  • Explains falling inequality in developing nations
  • Predicts political backlash in rich countries
  • Reality Is Messier
  • Adjustment costs: Workers can't easily switch industries
  • Geographic concentration: Losses hit specific regions hard
  • Offshoring threat: Even without actual trade, the threat suppresses wages
  • Labor standards: Competition with low-regulation economies pressures standards downward
  • Trade Adjustment Assistance: Programs exist but are chronically underfunded
Slide 22

Trade and Geopolitics

  • Trade is never purely economic -- it is always entangled with power:
  • Weaponized Interdependence
  • Countries use trade dependencies as leverage. Russia's gas supply to Europe, China's rare earth dominance, US control of the dollar system -- all are potential weapons.
  • Sanctions as Trade War
  • Economic sanctions are deliberate trade disruption. US sanctions reach extraterritorially through dollar dominance. Russia sanctions (2022) showed both power and limits of this tool.
  • Strategic Autonomy
  • Post-2020, nations prioritize self-sufficiency in critical goods: semiconductors, pharmaceuticals, rare earths, food. Efficiency yields to security.
  • Trade as Peace
  • The EU was founded on the premise that countries that trade don't fight. The "capitalist peace" hypothesis: economic interdependence raises the cost of war. Russia-Ukraine challenged this thesis.
Slide 23

Digital Trade and E-Commerce

  • The internet has created entirely new forms of cross-border exchange:
  • $6.3T
  • Global B2C e-commerce sales (2024). Cross-border e-commerce growing 25%+ annually. Small businesses can now export globally from day one.
  • Data Flows
  • Cross-border data flows grew 45x from 2005-2023. Data is the new oil -- but countries disagree on whether data should flow freely (US position) or be localized (China/EU approach).
  • Platform Economy
  • Amazon, Alibaba, Shopify enable millions of small traders to reach global markets. But platform power creates new dependencies and takes a commission cut of international trade.
  • The WTO has struggled to create rules for digital trade. A moratorium on customs duties for electronic transmissions (in place since 1998) remains controversial. The old trade architecture wasn't built for a world where the most valuable exports are streams of data.
Slide 24

Trade Finance: How Trade Gets Paid

  • International trade requires specialized financial infrastructure:
  • Letters of Credit
  • Banks guarantee payment on behalf of importers -- solving the trust problem between strangers in different countries with different legal systems. ~$2.5 trillion in trade finance annually.
  • SWIFT System
  • The messaging network connecting 11,000+ banks across 200 countries. Processes 42 million messages daily. Being cut off from SWIFT (as Russia was in 2022) is devastating.
  • Trade Insurance
  • Export credit agencies (ECAs) insure against political risk, non-payment, and currency fluctuation. Without insurance, trade with unstable regions would collapse.
  • Trade Finance Gap
  • $2.5 trillion in trade finance demand goes unmet -- mostly affecting small businesses in developing countries. This gap limits trade growth where it's needed most.
Slide 25

Trade Disputes and Resolution

  • When countries disagree on trade, where do they go?
  • WTO Dispute Settlement
  • Often called the "crown jewel" of the WTO
  • 600+ cases filed since 1995
  • Panel of trade law experts issues binding rulings
  • Compliance rate ~90% (states generally obey)
  • Crisis: US has blocked Appellate Body appointments since 2019, leaving the system non-functional
  • Famous Disputes
  • Banana War (1993-2012): US vs. EU over banana import regimes. 19 years to resolve.
  • Boeing vs. Airbus (2004-2021): Mutual subsidies. Both found guilty. $11.5B in authorized retaliation.
  • Cotton case (2002): Brazil wins against US cotton subsidies harming African farmers.
  • Rare earths (2012): US/EU/Japan win case against Chinese export restrictions.
Slide 26

The New Industrial Policy

  • After 40 years of free-trade consensus, governments are returning to active industrial policy:
  • US CHIPS Act (2022)
  • $52 billion in subsidies for domestic semiconductor manufacturing. Explicitly aims to reduce dependence on Taiwan. Industrial policy that would have been unthinkable a decade earlier.
  • EU Green Deal Industrial Plan
  • Massive subsidies for green technology manufacturing in Europe. A direct response to both US and Chinese subsidies. The subsidy competition escalates.
  • China's Made in 2025
  • State-directed effort to dominate 10 high-tech sectors: AI, robotics, EVs, biotech, aerospace. Combines subsidies, state procurement, and technology transfer requirements.
  • India's Production-Linked Incentives
  • Offers financial incentives for manufacturing in 14 sectors. Aims to make India an alternative to China in global supply chains. "Make in India" strategy.
  • The irony: developed nations that spent decades telling developing countries not to use industrial policy are now using it aggressively themselves. "Free trade for thee, subsidies for me."
Slide 27

Trade and Inequality

  • Globalization has reduced between-country inequality while increasing within-country inequality:
  • 1.1B
  • People lifted from extreme poverty since 1990, largely due to trade-driven growth in China and East Asia. The greatest poverty reduction in human history.
  • 2.4M
  • US manufacturing jobs lost to Chinese imports (2000-2015), according to Autor et al. Concentrated in specific communities with limited alternative employment.
  • The "Elephant Curve"
  • Branko Milanovic's famous chart: global middle class (Chinese/Indian workers) and the very rich gained enormously from globalization. The working class of rich nations stagnated.
  • This distributional pattern explains the political backlash: Brexit, Trump's tariffs, and anti-globalization movements reflect the anger of those left behind by trade liberalization.
Slide 28

Supply Chain Disruptions

  • COVID-19, the Suez Canal blockage, and geopolitical tensions revealed the fragility of global trade:
  • March 2020
  • COVID-19 shuts factories worldwide. PPE shortages reveal dependence on Chinese manufacturing. Toilet paper disappears from shelves -- a "bullwhip effect" in supply chains.
  • March 2021
  • Ever Given blocks the Suez Canal for 6 days. 12% of world trade halted. $9.6 billion in goods delayed per day. One ship demonstrates the system's chokepoint vulnerability.
  • 2021-2022
  • Global semiconductor shortage halts automobile production worldwide. A $50 chip shortage stops the sale of $50,000 cars. Modern supply chains have zero buffer.
  • 2023-2024
  • Houthi attacks in the Red Sea force shipping around Africa, adding 10-14 days to Asia-Europe routes. Geopolitical risk reprices ocean freight dramatically.
Slide 29

The Future of Trade

  • Several forces are reshaping the future of international commerce:
  • Fragmentation / Regionalization
  • The world may split into trading blocs: US-allied, China-allied, and non-aligned. "Slowbalization" replaces hyperglobalization. Friend-shoring over off-shoring.
  • AI and Automation
  • If robots can manufacture cheaply anywhere, the advantage of low-wage labor disappears. Reshoring becomes economically viable. But AI also enables new service trade.
  • Green Trade
  • Carbon border taxes will reshape comparative advantage. Countries with clean energy become more competitive. Fossil fuel exporters face stranded assets. Trade rules must adapt.
  • Digital and Weightless Trade
  • Software, data, AI services, remote work -- an increasing share of trade requires no ships. The geography of trade is changing as bits replace atoms.
Slide 30

Trade Policy Debates: Where Do You Stand?

  • Key contemporary arguments that divide economists and policymakers:
  • Free Traders Argue
  • Tariffs are taxes on consumers
  • Protectionism invites retaliation
  • Comparative advantage maximizes global welfare
  • Industrial policy picks losers more often than winners
  • Historical correlation: open economies grow faster
  • Skeptics Argue
  • Free trade theory assumes adjustment is free (it isn't)
  • National security requires domestic production capacity
  • China doesn't play by the rules; unilateral openness is naive
  • Every successful industrializer used protection (US, Germany, Japan, Korea)
  • Climate goals may require trade restrictions
  • The honest answer: both sides are partially right. Trade creates enormous gains but also real losses. The question isn't "free trade vs. protectionism" but "what mix of openness and protection, with what complementary policies, best serves both prosperity and justice?"
Slide 31

Trade by the Numbers

  • $25.3T
  • Total world merchandise trade (2023). About 30% of global GDP crosses a border.
  • #1 China
  • World's largest goods exporter ($3.5T). #2 US ($2.0T). #3 Germany ($1.7T). China's export surge since WTO accession (2001) reshaped the global economy.
  • 5,500 Ships
  • Container vessels at sea at any moment, carrying 90% of world trade. The largest (Ever Ace) carries 24,000 containers -- 15 miles of goods stacked end to end.
  • $2.5T Gap
  • Unmet demand for trade finance, mostly in developing countries. This financing gap prevents billions in potential trade from occurring.
Slide 32

Key Takeaways

  • Mutual Gain
  • Trade creates wealth by enabling specialization. Comparative advantage means even the "worst" producer benefits from trade. But gains are unevenly distributed.
  • Institutions Matter
  • Rules-based trade (WTO, trade agreements) prevented a repeat of 1930s protectionist spirals. But the system is under unprecedented strain.
  • Politics Returns
  • After 40 years of liberalization consensus, national security, inequality, and climate are pushing trade back toward managed competition.
  • Adaptation Required
  • Trade creates losers as well as winners. Without domestic policies (retraining, safety nets, investment) to manage disruption, political backlash is inevitable.
  • "Free trade is not a principle; it is an expedient."
  • -- Benjamin Disraeli
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